Embrittlement of RPV steels; An atom probe tomography perspective

Journal Article · Mon Jan 01 04:00:00 EST 2007 · Journal of Nuclear Materials

DOI:https://doi.org/10.1016/j.jnucmat.2007.05.003· OSTI ID:931714

Miller, Michael K ^[1]; Russell, Kaye F ^[1]

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1. ORNL

Atom probe tomography has played a key role in the understanding of the embrittlement of neutron irradiated reactor pressure vessel steels through the atomic level characterization of the microstructure. Atom probe tomography has been used to demonstrate the importance of the post weld stress relief treatment in reducing the matrix copper content in high copper alloys, the formation of {approx}-nm-diameter copper-, nickel-, manganese- and silicon-enriched precipitates during neutron irradiation in copper containing RPV steels, and the coarsening of these precipitates during post irradiation heat treatments. Atom probe tomography has been used to detect {approx}2-nm-diameter nickel-, silicon- and manganese-enriched clusters in neutron irradiated low copper and copper free alloys. Atom probe tomography has also been used to quantify solute segregation to, and precipitation on, dislocations and grain boundaries.

• Research Organization: Oak Ridge National Laboratory (ORNL); Shared Research Equipment Collaborative Research Center
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 931714
• Journal Information: Journal of Nuclear Materials, Journal Name: Journal of Nuclear Materials Vol. 371; ISSN 0022-3115; ISSN JNUMAM
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ATOMS
COPPER
COPPER ALLOYS
EMBRITTLEMENT
GRAIN BOUNDARIES
HEAT TREATMENTS
PRESSURE VESSELS
PROBES
STEELS
TOMOGRAPHY